Machine for trimming rubber heels



April 14, 1925.v 1,533,139-

, E. D. PUTT ET- AL MACHINE FOR TRIMMING RUBBER HEELS Original Filed Jan. 23, 1919 3 Sheets-Sheet 1 dwill l April 14, 1925. I 1,533,139

E. D. Pu'r'r ET Al.

CHINE FOR TRIMMING RUBBER HEELS original Filed Jau. 2:5, 1'919 Ssheets-Sheet 2 E. D. PUTT ET Al.

IACHINE FOR TRIMMING RUBBER HEELS s sheets-snm s Original Filed Jan. 23, 1919 Patented Apr. 14,1925.

UNITED STATES PATENT OFFICE,

EDWARD D. P'UTT AND WILLIAM C. STEVENS, 0F AKRON, OHIO, ASSIGNORS, BY HES-NE ASSIGNMENTS, T UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

IACHINE FOR TRIIHING RUBBER HEELS.

Application filed January 88. 1919, Serial No. 524,293. RenewediDecemher 22, 1921.

To all 'whom t may concern.

Be it known that We, EDWARD D. PU'l'r and lVxLLIAM C. STEVENS, citizens of the United States, residing at Akron, in the county of Summit, State of Ohio, have in vented certain new and useful Improvements in Machines for Trimming Rubber Heels, of which the following is a specification.

This invention relates to cutting machines and is herein illustrated as embodied in a machine for trimming the fin or overflow from rubber heels to prepare them for incorporation in boots and shoes.

Such heels are made by placing blanks of unvulcanized rubber or rubber compound in molds and subjecting them to heat and pressure. During this treatment more or less of the rubber Vflows into the spaces between the parts of the mold so that the vulcanized heels have fins or rinds which must be trimmed off preparatory to incorporating the heels in boots and shoes.

A machine for successfully competing with hand work in the trimming of rubber heels and similar articles should be rapid, free from liability to cut into the heels and capable of trimming heels of the prevailing shapes.

According to one feature of the present invention, there is provided in cooperative relation with the cutter by which the fin is severed, a combined feed member and guard which contacts with the side of the heel or other article above the fin. This member acts to aid in feeding the work, and to protect both the work and the fingers of the operator from accidental injury by the cutter. In the illustrative machine, this member takes the general form of a bell which is rotated about a vertical axis and partly encloses a rotary-cutter. The heel is presented with its side contacting with the bell and its projecting fin extending beneath the bell into the path of the cutter, and is thereafter manipulated t0 cause the fin to be trimmed off, the bell serving to facilitate the feeding of the heel and to prevent accidental in'ury both to the heel and to the fingers o the operator.

Other objects and advantages will appear as the. description proceeds and changes and modifications may be'made without departing from the spirit of the invention or sacri-- which the present invention is embodied.`

Fig. 2 is a partial sectionon the line 2-2 of'Fig. 1.

Fig. 3 is a longitudinal section through the trimming knife.

Fig. 4 is a plan view ofQa modification in which is provided a pressure wheel for holding the article in position.

Fig. 5 is a side elevation of Fig. 4, a portion of the base being removed.

The machine comprises a base plate 1 to which is secured a housing 2 supporting the trimming knife and work carrying table. On top of the table are secured bearings 4 and 5, in which is mounted a longitudinal shaft 6, one end carrying a drive pulley 7. Located centrally of the shaft is a trimming knife 8. This knife may be in any form, but that preferred by me is approximately oval in shape, carrying a plurality of spiral knife blades 9. The front of the housing carries a Work table 10, the forward edge of which is curved to co-operate with the knife and is provided with a cutting edge 11. The table is secured in any position of adjustment by a set screw 12, adjusting screws 13 being passed through the edge of the housing and bearing against the side of the table remote from its cutting edge.

Seated in a recess in the top of the table is a freely rotatable Work supporting disk 14 on which the article is placed, under which ball bearings 15 may be located.

Extending from the upper end of the standard 3 is a lateral pin 16 on the end of which is secured a bearing 17 rotatably f 5, we mount a pressure roller y29on a travelflush with said face, and means for rotating i side of the article opposite the bell 19. The

14bet'vveen the roller'29 and the bell 19 and receivinga shaft 18. The lower end of alone. Details which have been shown'arei lshaft' 18 carries a bell-shaped shield or not essential andthe apparatus may be alguard 19 which covers the rotary knife, the tered within range of the appended claims lower edge of the bell passing close to and without departing from the invention. Earalleling the` edge 11, but leaving a suf- 'We claim: i

cient gap for the passage of the heel rind. 1. A machine for trimming a fin from Around its lower end, the bell is provided a molded rubber heel or similar article havwith cylindrical bearing surface 20, against ing, in combination, a rotary cutter, a' co- Which the edge of the heel is pressed by the operating shear member, a thin-edged rotatoperator.l able guard having its Work-engaging portion The bell is arranged 4to be rotated at a extendingI in front of the cutter and located comparatively slow rateof speed by means close to said cutter, whereby a face. of the of a sprocket 21 secured to its up er end, article may be held against the guard and which sprocket is driven by a c ain 22 so fed as to cause the fin to be severed subfrom a second sprocket wheel 23. The latstantially flush with said face, and means ter' is carried and rotated by a vertical for rotating the guardto facilitatefeeding shaft 24 mounted on a bracket 25, the shaft the article.

obtaining rotary motion from a worm gear 2. A machine for trimming a fin from a 26 meshing with` a worm 27 on the main molded rubber heel or similar'article havshaft 6, y ing, in combination, a rotary cutter, a cov When the machine is being operated, the operating shear member, a thin-edged rotatknife 9 and shield 19 are in constant rotaable guard in the form of a bell having its tion. The operator placestherubberheel 28, worken, 1;ag1fingv portion extending in front or other article to be trimmed, on the turn off-the cutter and located close to said cutter.

table or disk 14, assing the rind through whereby a face of the article may be held the gap between t e lower edge of the bell against the guard and so fed as to cause thel and the cutting edge 11, and holding the fin to be lsevered substantially flush with side of the heel against the surface 20, The said face, and means for rotating the guard rotation of the bell causes the heel to adto facilitate feeding the article.

Vance, and the disk 14fallows it to turn until 3. A machine for trimming a fin from a its entire edge is trimmed. A light pressure molded rubber heel or similar article havon the top of the heel by the handl of the ing, in combination, a rotary cutter, a thinoperator will cause it to bear against the edged rotatable guard having its work-enf bell and will assist in presenting the entire gaging portion extending in front of the edge of the heel to the action of the knife. cutter and located close to said cutter, a Both edges of the heel may be quickly and work support extending close to the operaeasily trimmed, and the work will be .done tive -edge of the cutter whereby the article more neatly than 1t is possible to do 1t by ymay be placed upon the work support with hand. a face held against ythe guard and so fed as In the modification shown in Figs. .4'a'nd to cause the fin to be severed substantially ing shaft 30, which roller bears against the the guard to facilitate feeding the article.

4. A machine for trimming a fin from a shaft 30 1s carried on a swlnglllg arm 31 molded rubber'heel or similar article havpivoted at 32 and provlded with a handle i'ng, in combination, a rotary cutter, a work 33 by which it may be moved in and out. support adapted to support the' article with An arc. shaped Slot 34 iS pl'OvldBd in the the lin projecting intothe path of the'cuttable which permits the shaft to move in ter, a thin-edged, h9llow, rotatable guard and out. The shaft 30 carries a sprocket 35 extending over the cutter and having its driven by a chain 3 6 from a second sprocket operative, article-engaging portion located 37 located at the plvot of the arm 31. The close to said cutter, whereby' a face of the sprocket 37 is united to a similar sprocket article may be held against the guard and 3 8, which is driven by a chain 39 and the article moved so as to cause the fin to be sprocket 40 on the lower end of the shaft 24.A Severed close to the edge of said face, and In this form of the invention vthe article means forrotating the guard to facilitate to be `trimmed is placed on the turntable feeding the articl i 5. In a machine for trimmin rubber .firmly held b pressure on the lever33.' 'The heels, a rotary trimming knife havlng spiral movement oA the bell andthe roller Cause-S blades, means for rotating said knife a movthe article to be fedto the kmfe and turned able heel supporting disk, a bell suspended about as necessary. over the knife lhaving a bearing surface at The machine' shown in this application its lower edge against which the side of the is particularly suitable for trimming rubheel may be pressed andjmeans for rotating ber heels or other articles of an irregular the bell. shape, although not Alimited to such use 6. A machine for trimming articles Chaving a rind or projecting edge, comprising a table provided with a cutting edge, a knife adapted to cooperate with said cutting edge, a circular shield over the knife, the lower edge of said shield being spaced from the edge of the table providing a narrow slot through which the edge of the article to be trimmed may project, and means for rotating the shield.

' 7. A machine lfor trimming articles having a rind or projecting edge, comprising a table provided with an arc shaped cutting edge, a knife at the rear of said cutting edge, said knife being curved to fit said edge,v a circular shield over said knife, the lower edge of the shield being spaced from the edge of the table to provide a slot, and means for rotating the shield.

8. A machine for trimming articles having a rind or projecting edge comprising a stationary table provided with a cutting edge, a knife at the rear of the cutting edge, a circular shield over the knife, the lower edge of said shield being spaced from the edge of the table to provide a narrow slot .through which the edge of the article to be trimmed. may project, means for rotating the shield and a rotatable work supporting disk in said table.

9. A machine for trimming articles having a rind or pro'ecting edge, comprising a table provided with an arc shaped cutting edge, a knife at the rear of said cutting edge, said knife being curved to it said edge, a circular shield over said, knife, thc lower edge of the shield being spaced from the edge'of the table to provide a slot, means for rotating the shield, and a rotatable work supporting disk set into said table.

10. In a machine for trimming rubber heels or similar articles, a knife, a rotatably mounted shield over the knife, a work support in front of said shield and means located on said work support to facilitate shifting of the article to present its entire outer surface to the shield. f

11. In a machine for trimming rubber heels or similar articles, a rotary knife, a rotatablyimounted shield over said knife, a work table in front of said shield and a revolving support in said work table on which the articles rest while held in contact with said shield.

12. In a machine for trimming rubber heels or similar articles a knife, a rotatably mounted shield over the knife, means forl rotating the shield, a work support inV front of said shield and means located on said work support to aid in shifting the article to present all of its edges to the knife.

13. In a machine for trimming rubber heels or similar articles, a rotary knife, a rotatably mounted shield over the knife, means lfor rotating in front of said shield, a revolving support in said work table on which the articles rest while Vheld in contact with the shield.

14. A machine for trimming the rind or fin from a face of a rubber heel having, in combination, a cutter, means for operating the cutter, a Work support heel may be placed with its n projecting into the path of the cutter in suchmanner that it will'be severed flush with said face, a feed member adapted tocontact with the side face of the heel above the fin, and means for operating said member.

15. A machine for trimming the rind or fin from a face of a rubber heel having, in combination, a cutter, means for operating the cutter, a work support, a hollow shield partly covering the cutter and having an edge extending in front of the cutter and spaced from the work support, the construction and arrangement being such that the base of the fin close to the face from which it projects lies ter, and means for rotating the shield.

16. A machine for trimming the rind or fin from a rubber heel or similar article having, in combination, a turn table to support the article, al cutter, means for operating the cutter, a shield overhanging the cutter and adapted to engage a locality on a side of the article, means for rotating the shield, a pressure roller adapted to engage a side of the article at a point opposite that engaged by the shield, and means for rotating the pressure roller.

17. A machine for severing a sheet-like portion which projects from a face of article having, in combination, a sup ort for the article, a rotary cutter, a thin-e ged member having its work-engaging portlon extending in front ofthe cutter, the space above the work support being free and unobstructed to permit the article tobe moved over the support .with the face from which the projecting ortion vextends in contact with the thin-e ged member and with the projecting portion in osition to be severed substantially Hush wit the face from which it projects, and. means for rotating the guard.'

EDWARD D. PUTT. WILLIAM C. STEVENS..

the shield, a work table u on which a l in the path of the cutu 

